Title:
IMPROVEMENT IN IRON LOSS OF STATOR FOR LARGEETYPE ROTARY ELECTRIC MACHINE
Document Type and Number:
Japanese Patent JPS5683245
Kind Code:
A
Abstract:
PURPOSE:To reduce iron loss on both tooth and yoke of a core and to improve energy-saving effect, by applying pulse laser at a constant pitch and in a prescribed direction, on surface of a fanlike element of the core punched out from a unidirectional silicon steel plate. CONSTITUTION:A fanlike element 20 of a stator core is punched out from a unidirectional silicon steel plate 10 in such a manner that length-wise direction of the fanlike element 20 is to become parallel with or at right angle to the rolling direction F. Pulse laser is applied at a constant pitch l on the surface of the fanlike element 20 in such a manner as to be directed in radial direction for a yoke section 20a and in circumferential direction for a tooth section 20b. It is possible, by doing so, to form on the surface of the fanlike element 20 small projections which is easily magnetized and to reduce iron loss.
Inventors:
ICHIYAMA TADASHI
YAMAGUCHI SHIGEHIRO
INOUCHI TOORU
YAMAGUCHI SHIGEHIRO
INOUCHI TOORU
Application Number:
JP16050279A
Publication Date:
July 07, 1981
Filing Date:
December 11, 1979
Export Citation:
Assignee:
NIPPON STEEL CORP
International Classes:
H02K15/02; (IPC1-7): H02K15/02